EP2453558B1 - Pump unit - Google Patents

Pump unit Download PDF

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Publication number
EP2453558B1
EP2453558B1 EP11002129.2A EP11002129A EP2453558B1 EP 2453558 B1 EP2453558 B1 EP 2453558B1 EP 11002129 A EP11002129 A EP 11002129A EP 2453558 B1 EP2453558 B1 EP 2453558B1
Authority
EP
European Patent Office
Prior art keywords
terminal box
stator housing
connection
pump assembly
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11002129.2A
Other languages
German (de)
French (fr)
Other versions
EP2453558A2 (en
EP2453558A3 (en
Inventor
Georg Blaser
Pino Brösamle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Priority claimed from DE102010051916A external-priority patent/DE102010051916A1/en
Priority claimed from DE102010051918A external-priority patent/DE102010051918A1/en
Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to US13/884,631 priority Critical patent/US9800098B2/en
Priority to PCT/EP2011/069260 priority patent/WO2012062636A2/en
Priority to CN201180064776.4A priority patent/CN103299515B/en
Publication of EP2453558A2 publication Critical patent/EP2453558A2/en
Publication of EP2453558A3 publication Critical patent/EP2453558A3/en
Publication of EP2453558B1 publication Critical patent/EP2453558B1/en
Application granted granted Critical
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0606—Canned motor pumps
    • F04D13/064—Details of the magnetic circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—Bearings
    • F04D29/0467—Spherical bearings
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
    • G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/28—Layout of windings or of connections between windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
    • H02P6/14—Electronic commutators
    • H02P6/16—Circuit arrangements for detecting position
    • H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
    • H02P6/182—Circuit arrangements for detecting position without separate position detecting elements using back-emf in windings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/182—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to stators axially facing the rotor, i.e. with axial or conical air gap
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • H02K5/1282—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs the partition wall in the air-gap being non cylindrical
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • the invention relates to a pump unit with an electric drive motor, which has a stator housing and at least one terminal box connected to it.
  • Pump units for example circulating pump units, such as heating circulating pumps or service water circulating pumps usually have an electric drive motor arranged in a tubular stator housing, the stator housing being connected at one axial end to a pump housing in which at least one impeller rotates to convey a liquid.
  • an electronics housing or terminal box is usually arranged on the outside of the stator housing, in which electrical connection elements and electrical and/or electronic components for controlling the drive motor are arranged.
  • the electronic components can in particular include a frequency converter.
  • Such a terminal box can be arranged circumferentially or also axially on the end of the stator housing facing away from the pump housing.
  • the terminal boxes of such pump units can have a plug-in area for the electrical connection, to which an electrical connection cable can be plugged with a corresponding plug.
  • a pump unit is z. e.g WO 2008/019818 A1 known.
  • terminal boxes are known which have a removable cover on their outside and a cable bushing in one wall. Through this cable gland a cable can be routed inside the terminal box and then connected to terminals inside the terminal box with the cover removed.
  • the terminal boxes have electrical connections for connection to the coils of the stator inside the stator housing. Plug contacts are also known for this purpose, which must be arranged on the side of the terminal box facing the stator housing. This is also z. e.g WO 2008/019818 A1 known.
  • the terminal box must have several openings for the electrical connection elements and a cover for connecting a connecting cable on its outside. This requires a complicated structure. In particular, however, sealing is problematic since seals must be provided at each opening in order to prevent moisture from penetrating into the terminal box.
  • Electric drive motor with a frequency converter which has a stator housing and at least one terminal box connected to it, the terminal box having at least one partition in its interior, which divides an interior of the terminal box into at least one electronics area with electronic components and a connection area, the connection area at an outer wall of the terminal box is adjacent, in which at least one cable bushing is formed and in the connection area there are both electrical connections for at least one connection line and contacts for the electrical connection to electrical or electronic components arranged inside the stator housing, with the connection area facing the stator housing .
  • DE 10 2004/027744 A1 discloses an electric motor with an electronics box, which can be installed as a module.
  • a carrier with an adapter plate is formed on the motor housing of the electric motor, on which the electronics box can be placed.
  • JP 2003 018797 A discloses an electric motor with an electronics housing attached to the outside of the motor.
  • the electronics housing shown there is divided into several rooms, a room in which electronic components are arranged and a room in which the electrical connection lines are contacted.
  • the electrical connections to the motor are in turn located in another space facing the motor. In order to be able to make the electrical connections, this electronics housing must also be opened completely so that the electronics are freely accessible and no longer protected against damage.
  • the object of the invention is to improve a pump unit in such a way that a terminal box or an electronics housing can be contacted in a simple manner both with the coils inside the stator housing and with an electrical connecting line and, moreover, the electronics housing and electronic components can be easily sealed are protected inside the electronics housing.
  • the pump unit according to the invention has, in a known manner, an electric drive motor which is arranged in a stator housing.
  • a stator with electrical coils is arranged in the stator housing.
  • a rotor rotates inside the stator, which in turn is connected in a rotationally fixed manner to at least one impeller of the pump assembly via a shaft or in some other suitable manner.
  • a can or a separating cap can be arranged between the rotor and the stator in order to design the drive motor as a wet-running electric motor.
  • the electric drive motor points above it addition, a terminal box which is connected to the stator housing on its outside. The terminal box can be attached radially or axially to the stator housing.
  • the terminal box is designed in such a way that it has at least one partition in its interior. This divides the interior of the terminal box, which is delimited by the outer walls of the terminal box, into at least two areas, namely an electronics area and a connection area.
  • the electrical and electronic components that are usually arranged in such terminal boxes are arranged in the electronics area. In particular, these can be electronic components for motor control, for example parts of a frequency converter or for voltage adjustment for the drive motor.
  • the electrical connections for connecting the terminal box are arranged in the connection area.
  • connection area borders on an outer wall of the terminal box, in which at least one cable bushing is formed.
  • connection line for example a mains cable
  • contacts for the electrical connection to electrical or electronic components which are arranged inside the stator housing, are also present in the same connection area. These are, for example, the stator coils or other electrical or electronic components inside the stator housing.
  • the electrical connections for connecting the terminal box to the stator inside the stator housing are also arranged in the connection area.
  • the partition wall ideally forms a closed electronics area in the remaining area of the terminal box, so that the other electronic components inside this electronics area are protected, even if the connection area has to be opened to connect a connection line to the electrical connections arranged there.
  • connection area faces the stator housing. This is advantageous because, as described above, contacts for the electrical connection to the electronic and/or electrical components arranged inside the stator housing are also arranged in the connection area. In this way, these contacts can be engaged directly with corresponding contacts or terminals on the stator housing.
  • connection area is designed to be open towards the stator housing and is closed by the adjoining stator housing or by a cover closing the stator housing.
  • a seal may be arranged, which serves to seal the connection area from the outside, so that no moisture can penetrate from the outside into this area and thus into the interior of the terminal box or the stator housing.
  • the terminal box is particularly preferably attached to an axial end face of the stator housing.
  • the terminal box can have an outer shape that corresponds to the outer shape of the stator housing, so that a harmonious transition between the stator housing and the terminal box can be achieved.
  • the stator housing is preferably tubular with a circular cross section. Accordingly, the terminal box can also be circular with the same diameter as the axial end of the stator housing, so that the terminal box can be connected flush to the axial end of the stator housing.
  • the round or circular shape has the advantage that the contact surface between the stator housing and the terminal box can be easily sealed with a circumferential seal. This can be in the form of an O-ring or, for example, it can also be injection molded onto the terminal box or the stator housing. The latter is particularly useful when the stator housing and/or terminal box are made of plastic.
  • connection terminals or plug-in contacts are preferably designed as connection terminals or plug-in contacts. This makes it possible to contact the connecting cable with the electrical connections, ideally without tools.
  • connection terminals or plug contacts required for this preferably extend through the partition wall.
  • the connection terminals or plug-in contacts are electrically conductively connected to electrical or electronic components inside the electronics area.
  • the connection terminals or are particularly preferred Plug contacts arranged directly on a printed circuit board, which is located in the electronics area.
  • the connection terminals or plug-in contacts can then extend through the partition in such a way that those areas of the connection terminals or plug-in contacts which have to be contacted with a connecting line are located in the connection area of the terminal box. Necessary operating elements such as levers for opening and/or closing the connection terminals are then preferably located in the connection area. In this way, the connection cable can be connected to connection terminals or plug-in contacts without having to open the electronics area.
  • connection terminals the electrical connection to the electronics area is established by the connection terminals.
  • the arrangement of the connection terminals and plug contacts is very simple, since these can be placed with other electrical and electronic components on a printed circuit board, which is arranged in the electronics area.
  • the connection terminals or plug-in contacts can extend through the partition wall, it can have an opening. If necessary, a seal can also be arranged in the area of this opening.
  • connection terminals for connecting the connection line preferably have a lever for opening the terminals.
  • the lever is preferably opened against a spring preload, whereby connection openings of the terminals are released, into which the electrical conductors of a connecting line are inserted.
  • the lever is then moved back to its original position, preferably by spring force and inside the conductors of the connection cable are clamped.
  • the lever is preferably arranged in such a way that, in order to open it, it can be moved towards a cable bushing in a wall of the connection space.
  • the connection terminal is preferably arranged opposite the cable bushing, so that the openings into which the conductors of the cable are inserted are opposite the cable bushing. If the lever then has to be pushed in the direction of the cable bushing to open the terminals, this has the advantage that the lever with the terminal box can be gripped with one hand and moved towards the cable. The lever can be held in the open position very easily.
  • the contacts for the electrical connection to the electrical or electronic components inside the stator housing are more preferably designed as plug contacts which engage with corresponding plug contacts on the stator or stator housing. This makes it possible to easily plug the terminal box onto the stator housing, the plug contacts between the terminal box and the stator then engaging with one another in an electrically conductive manner. It is particularly advantageous if the terminal box also has to be removed from the stator housing in order to connect the connecting cable, since this connection can then be easily separated and reconnected.
  • connection area borders on an outer wall of the terminal box, in which at least one cable bushing is formed.
  • this is preferably an outer wall which faces away from the stator housing. If the terminal box is attached to the axial end face of the stator housing, the terminal box can be cup-shaped, with its open side being attached to the end face of the stator housing.
  • the cable bushing is then preferably in a peripheral wall of the terminal box.
  • the connection area then preferably borders on the open side facing the stator housing and on this peripheral wall with the cable bushing.
  • the cable bushing can have a seal and/or strain relief for the connection cable in a known manner
  • operating elements can also be arranged in the connection area.
  • an adjusting element for adjusting the speed of the drive motor can be arranged there.
  • Such an adjustment element can be designed so that it can be actuated or adjusted from the connection area and extends through the partition wall into the electronics area, in which a corresponding electrical or electronic component is then provided, which converts an adjustment movement into an electrical variable .
  • a potentiometer can be provided here, which can be turned by means of an adjusting screw arranged in the connection area.
  • the adjusting screw or a shaft can extend through the partition.
  • the partition wall extends at least in one section obliquely to the outer sides, in particular the end faces of the terminal box.
  • the connection area has a greater height in the area in which a cable bushing opens than in the other areas.
  • a greater height or depth of the connection area may be required in the area of the cable bushing, since the cable bushing is preferably arranged in a side or peripheral wall of the terminal box.
  • the terminal box is preferably pot-shaped with an open side, which is closed by the stator housing or a cover closing the stator housing.
  • the terminal box is placed with the open side on the stator housing, preferably on its axial end face.
  • a seal can be provided on the circumference of the opening of the terminal box or a sealing surface against which a seal arranged on the stator housing comes to rest for sealing purposes.
  • the dividing wall preferably extends obliquely to the open end face of the pot. In this way, a connection area can be created which has a greater axial height on the side of the cable bushing, which is preferably provided on a peripheral wall of the pot, so that the cable can be inserted into the connection area from this side .
  • the sloping partition wall is more preferably located opposite the cable bushing, so that a cable pushed into the cable bushing from the outside is preferably deflected in its direction by the sloping partition wall, so that it can be easily grasped from the opening of the terminal box and inserted into a connection terminal.
  • the partition wall is preferably a separate component which is inserted into the terminal box and is connected to the walls of the terminal box, preferably by means of a snap-in connection.
  • This enables simple manufacture and assembly of the terminal box.
  • the electronic components can first be arranged in the electronics area or on the partition and the partition can then be inserted into the terminal box, as a result of which the electronics area is closed and separated from the connection area. If necessary, a seal can be placed between the partition and the adjacent wall of the terminal box to seal off the electronics area be arranged, the connection via snap-in connections enables very simple assembly.
  • the partition carries at least one printed circuit board arranged in the electronics space. This simplifies assembly even further, since the printed circuit board can be fastened to this partition before inserting the partition and can then be inserted into the terminal box together with the partition. This eliminates the need for separate fixing and assembly of the printed circuit board inside the terminal box.
  • a connection in particular a connector plug for connection to the electrical or electronic components inside the stator housing can also be formed on the partition. Then this electrical connection can be connected directly to the circuit board on the other side of the partition.
  • the printed circuit board can extend through an opening in the partition wall with a section forming a plug contact. This is preferably a side or front edge of the printed circuit board, with electrical contacts being formed adjacent to this front or side edge on one or two opposite surfaces of the printed circuit board, which can be contacted with a connector plug on the stator housing.
  • the pump unit is preferably a circulating pump unit, in particular a heating or service water circulating pump unit.
  • the drive motor can preferably be a canned motor or spherical motor with a separating cap.
  • a can separating the stator space from the rotor space is arranged between the stator and the rotor.
  • a spat tube is to be understood as meaning any element suitable for separating the rotor space and the stator space, independently from its shape.
  • a split tube can also be designed in the shape of a disk or a dome.
  • the pump unit in 1 has, in a known manner, a stator housing 2 which is essentially tubular and inside which a stator 4 with the usual iron parts and stator coils is arranged.
  • the stator 4 surrounds a separating cap or a can 6, which at the same time encloses the axial end of the stator housing 2 by being bent outwards and flanged around the axial end face of the stator housing 2.
  • a rotor 8 is rotatably mounted inside the can 6, a rotor 8 is rotatably mounted.
  • the embodiment shown here is a spherical motor in which the rotor 8 is hemispherical and the can 6 is correspondingly hemispherical or dome-shaped in the form of a separating cap.
  • An impeller 10 is integrated into the rotor 8 .
  • the stator housing 2 is connected to the pump housing by means of a union nut 12.
  • a pot-shaped terminal box 14 is attached to the stator housing 2 .
  • the stator housing 2 is additionally closed by a cover 16 on this axial side.
  • the stator housing 2 could also be closed directly by the terminal box 14.
  • the terminal box has an outer diameter which essentially corresponds to the outer diameter of the stator housing 2 or its casing. In this way, an essentially cylindrical pump unit is created overall.
  • a printed circuit board 18 which makes electrical contact with the coils of the stator 4 and optionally carries electronic or electrical components, for example a motor controller.
  • the printed circuit board 18 is provided with a connector plug 20 which extends through the cover 16 .
  • the connector plug 20 is used to make contact with the electrical and electronic components inside the terminal box 14.
  • the terminal box 14 of the pump unit shown in an individual view has a pot-shaped outer wall, consisting of an annular peripheral wall 22 and a base 24 extending transversely.
  • the peripheral wall 22 extends about the longitudinal or axis of rotation X, the base 24 extends essentially transversely for this purpose at an axial end of the peripheral wall 22.
  • the peripheral wall 22 and the bottom 24 are preferably formed in one piece from plastic.
  • the terminal box 14 is open.
  • the open axial end 26 is closed by the stator housing 2 when it is connected to the terminal box 14 .
  • a circumferential seal 28 is assigned to the stator housing, which seal comes to rest on the inner circumference of the circumferential wall 22 in the region of the axial end 26 .
  • a partition wall 30 is arranged inside the terminal box 14 . This divides the interior of the terminal box 14 into two areas, namely an electronics area 32 and a connection area 34.
  • the partition wall 30 has two sections 30a and 30b.
  • the section 30a extends substantially parallel to the bottom 24, ie transversely to the longitudinal axis X in the vicinity of the open axial end 26. Starting from this section 30a, the section 30b extends at an angle to the peripheral wall 22 and the bottom 24.
  • the connection area 34 has only a small axial height in the direction of the longitudinal axis X, which then increases in the area in which the section 30b of the partition wall 30 extends obliquely to the opposite peripheral wall 22.
  • a cable bushing 36 is formed in this peripheral wall, through which a connection cable can be routed into the connection area 34 inside the terminal box 14 .
  • the grommet 36 faces the inclined portion 30b of the bulkhead 30 .
  • a printed circuit board 38 is arranged in the electronics area 32 and carries electronic components for controlling and/or supplying voltage to the electric motor. These electronic components 40 can contain a voltage converter, for example.
  • the printed circuit board 38 extends transversely to the floor 24 essentially parallel to the longitudinal axis X and reaches through an opening 42 in the partition wall 30.
  • the printed circuit board 38 is fixed to the partition wall 30 in this way.
  • the section 44 of the printed circuit board 38 which extends through the opening 42 and protrudes into the connection area 34, forms a plug-in contact or plug-in area.
  • electrical contacts are applied to the surfaces adjacent to this front edge of the printed circuit board, which can engage with electrical contacts in the connector plug 20 when the terminal box 14 is placed on the stator housing 2 .
  • the section 44 of the printed circuit board 38 engages in the connector plug 20 in an electrically contacting manner.
  • an electrical connection between the electrical and electronic components in the electronics area 32 and electronic components in the electronics area 32 of the terminal box 14 and the electrical and electronic components inside the stator housing 2 are produced.
  • the electrical or electronic components inside the stator housing 2 are arranged in particular on the circuit board 18 or are electrically contacted via it, such as the coils. This connection for connecting the terminal box to the electrical and electronic components inside the stator is thus formed by the section 44 of the printed circuit board 38, which is located in the connection area 34.
  • a connecting terminal 46 is arranged on printed circuit board 38, which extends through partition 30 through an opening in such a way that a section 46a of connecting terminal 46, in which the openings for inserting the conductors of a connecting cable are formed, is located in connecting area 34 or are open to the connection area 34, so that the conductors of the connection cable in the connection area 34 can be inserted into the connection terminal 46.
  • the connection terminal 46 also has a lever 48 . which must be pressed to open the connection terminal. For this purpose, it is provided in this embodiment that, in order to open the connection terminal 46, the lever 48 must be moved in the direction of the cable bushing 36, ie in the direction of arrow A in FIG figure 2 . This has the advantage that the terminal box 14 and the lever 48 can be gripped with one hand and the connection cable can be pushed into the terminal box from the other side with the other hand, so that the cable can be easily connected to the connection terminal 46 .
  • connection terminal 46 or its section 46a with the openings for inserting a cable and the plug-in area formed by the section 44 of the printed circuit board 38 for connecting the electrical components inside the stator housing 2 are located in the same connection area 34 Inside the terminal box 14. This has the advantage that the terminal box 14 only has to have one opening, which has to be sealed. To connect the connecting line, the terminal box 14 can simply be removed from the stator housing, as a result of which the connection area 34 then becomes accessible.
  • the partition wall 30 is first connected to the circuit board 18, i.e. the section 44 of the circuit board 18 is guided through the opening 42.
  • the partition wall 30 is then inserted into the terminal box 14 and latched there via latching elements 49 on the peripheral wall 22 . So a simple assembly of the partition 30 with the circuit board 18 inside the terminal box 14 is possible.
  • an adjusting element in the form of an adjusting screw 50 is arranged in the connection area 34, via which the engine speed can be adjusted.
  • the set screw 50 is connected to a shaft 52 which extends through the portion 30a of the bulkhead 30 and which actuates a potentiometer 54 arranged on the printed circuit board 38 .
  • FIG. 3 shows an alternative embodiment of the terminal box 14, which differs from the embodiment described above in that additional operating elements 56 and display elements 58 are arranged in the base 24'.
  • an additional connector plug 60 is formed in a peripheral wall 22 adjoining the electronics area 32 and is used to connect a sensor element.

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  • Engineering & Computer Science (AREA)
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  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor Or Generator Frames (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Rotary Pumps (AREA)
  • Control Of Electric Motors In General (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Details Of Reciprocating Pumps (AREA)

Description

Die Erfindung betrifft ein Pumpenaggregat mit einem elektrischen Antriebsmotor, welcher ein Statorgehäuse und zumindest einen mit diesem verbundenen Klemmenkasten aufweist.The invention relates to a pump unit with an electric drive motor, which has a stator housing and at least one terminal box connected to it.

Pumpenaggregate, beispielsweise Umwälzpumpenaggregate, wie Heizungsumwälzpumpen oder Brauchwasserumwälzpumpen weisen üblicherweise einen in einem rohrförmigen Statorgehäuse angeordneten elektrischen Antriebsmotor auf, wobei das Statorgehäuse an einem Axialende mit einem Pumpengehäuse verbunden ist, in welchem mindestens ein Laufrad zur Förderung einer Flüssigkeit rotiert. Bei bekannten Pumpenaggregaten ist meist außen am Statorgehäuse ein Elektronikgehäuse bzw. Klemmenkasten angeordnet, in welchem elektrische Anschlusselemente und elektrische und/oder elektronische Bauteile zur Steuerung des Antriebsmotors angeordnet sind. Die elektronischen Bauteile können insbesondere einen Frequenzumrichter umfassen. Ein solcher Klemmenkasten kann umfänglich oder auch axial an den dem Pumpengehäuse abgewandeten Ende des Statorgehäuses angeordnet sein.Pump units, for example circulating pump units, such as heating circulating pumps or service water circulating pumps usually have an electric drive motor arranged in a tubular stator housing, the stator housing being connected at one axial end to a pump housing in which at least one impeller rotates to convey a liquid. In known pump units, an electronics housing or terminal box is usually arranged on the outside of the stator housing, in which electrical connection elements and electrical and/or electronic components for controlling the drive motor are arranged. The electronic components can in particular include a frequency converter. Such a terminal box can be arranged circumferentially or also axially on the end of the stator housing facing away from the pump housing.

Die Klemmenkästen solcher Pumpenaggregate können zum elektrischen Anschluss einen Steckbereich aufweisen, an welchem ein elektrisches Anschlusskabel mit einem korrespondierenden Stecker angesteckt werden können. Ein solches Pumpenaggregat ist z. B. aus WO 2008/019818 A1 bekannt. Alternativ sind Klemmenkästen bekannt, welche auf ihrer Außenseite einen abnehmbaren Deckel und in einer Wandung eine Kabeldurchführung haben. Durch diese Kabeldurchführung kann ein Kabel in das Innere des Klemmenkastens geführt werden und dann bei abgenommenem Deckel im Inneren des Klemmenkastens an Anschlussklemmen angeschlossen werden. Darüber hinaus weisen die Klemmenkästen elektrische Anschlüsse zur Verbindung mit den Spulen des Stators im Inneren des Statorgehäuses auf. Auch hierzu sind Steckkontakte bekannt, welche an der dem Statorgehäuse zugewandten Seite des Klemmenkastens angeordnet werden müssen. Auch dies ist z. B. aus WO 2008/019818 A1 bekannt.The terminal boxes of such pump units can have a plug-in area for the electrical connection, to which an electrical connection cable can be plugged with a corresponding plug. Such a pump unit is z. e.g WO 2008/019818 A1 known. Alternatively, terminal boxes are known which have a removable cover on their outside and a cable bushing in one wall. Through this cable gland a cable can be routed inside the terminal box and then connected to terminals inside the terminal box with the cover removed. In addition, the terminal boxes have electrical connections for connection to the coils of the stator inside the stator housing. Plug contacts are also known for this purpose, which must be arranged on the side of the terminal box facing the stator housing. This is also z. e.g WO 2008/019818 A1 known.

D.h. der Klemmenkasten muss mehrere Öffnungen für die elektrischen Anschlusselemente und einen Deckel zum Anschließen einer Anschlussleitung an seiner Außenseite aufweisen. Dies erfordert einen komplizierten Aufbau. Insbesondere ist jedoch die Abdichtung problematisch da an jeder Öffnung Dichtungen vorgesehen werden müssen, um ein Eindringen von Feuchtigkeit in den Klemmenkasten zu verhindern.This means that the terminal box must have several openings for the electrical connection elements and a cover for connecting a connecting cable on its outside. This requires a complicated structure. In particular, however, sealing is problematic since seals must be provided at each opening in order to prevent moisture from penetrating into the terminal box.

WO 98/35424 A1 offenbart: WO 98/35424 A1 disclosed:

Elektrischer Antriebsmotor mit einem Frequenzumrichter, welcher ein Statorgehäuse und zumindest einen mit diesem verbundenen Klemmenkasten aufweist, wobei der Klemmenkasten in seinem Inneren zumindest eine Trennwand aufweist, welche einen Innenraum des Klemmenkastens in zumindest einen Elektronikbereich mit elektronischen Bauteilen und einen Anschlussbereich teilt, wobei der Anschlussbereich an eine Außenwandung des Klemmenkastens angrenzt, in welcher zumindest eine Kabeldurchführung ausgebildet ist und in dem Anschlussbereich sowohl elektrische Anschlüsse für zumindest eine Anschlussleitung als auch Kontakte zur elektrischen Verbindung mit im Inneren des Statorgehäuses angeordneten elektrischen oder elektronischen Bauteilen vorhanden sind, wobei der Anschlussbereich dem Statorgehäuse zugewandt ist.Electric drive motor with a frequency converter, which has a stator housing and at least one terminal box connected to it, the terminal box having at least one partition in its interior, which divides an interior of the terminal box into at least one electronics area with electronic components and a connection area, the connection area at an outer wall of the terminal box is adjacent, in which at least one cable bushing is formed and in the connection area there are both electrical connections for at least one connection line and contacts for the electrical connection to electrical or electronic components arranged inside the stator housing, with the connection area facing the stator housing .

DE 10 2004/027744 A1 offenbart einen Elektromotor mit einem Elektronikkasten, welcher als Modul aufsetzbar ist. Dazu ist an dem Motorgehäuse des Elektromotors ein Träger mit einer Adapterplatte angeformt, auf welchen der Elektronikkasten aufgesetzt werden kann. DE 10 2004/027744 A1 discloses an electric motor with an electronics box, which can be installed as a module. For this purpose, a carrier with an adapter plate is formed on the motor housing of the electric motor, on which the electronics box can be placed.

JP 2003 018797 A offenbart einen Elektromotor mit einem Elektronikgehäuse, welches an der Außenseite des Motors angesetzt ist. Das dort gezeigte Elektronikgehäuse ist in mehrere Räume geteilt, einem Raum, in welchem elektronische Komponenten angeordnet sind und einen Raum, in welchem die elektrischen Anschlussleitungen kontaktiert sind. Die elektrischen Anschlüsse zu dem Motor hin liegen wiederum in einem weiteren dem Motor zugewandten Raum. Um die elektrischen Anschlüsse herstellen zu können, muss auch dieses Elektronikgehäuse vollständig geöffnet werden, sodass die Elektronik frei zugänglich und nicht mehr sicher vor Beschädigungen geschützt ist. JP 2003 018797 A discloses an electric motor with an electronics housing attached to the outside of the motor. The electronics housing shown there is divided into several rooms, a room in which electronic components are arranged and a room in which the electrical connection lines are contacted. The electrical connections to the motor are in turn located in another space facing the motor. In order to be able to make the electrical connections, this electronics housing must also be opened completely so that the electronics are freely accessible and no longer protected against damage.

Es ist Aufgabe der Erfindung, ein Pumpenaggregat in der Weise zu verbessern, dass ein Klemmenkasten bzw. ein Elektronikgehäuse auf einfache Weise sowohl mit den Spulen im Inneren des Statorgehäuses als auch mit einer elektrischen Anschlussleitung kontaktierbar ist und darüber hinaus das Elektronikgehäuse leicht abzudichten sowie elektronische Bauteile im Inneren des Elektronikgehäuses geschützt angeordnet sind.The object of the invention is to improve a pump unit in such a way that a terminal box or an electronics housing can be contacted in a simple manner both with the coils inside the stator housing and with an electrical connecting line and, moreover, the electronics housing and electronic components can be easily sealed are protected inside the electronics housing.

Diese Aufgabe wird durch ein Pumpenaggregat mit den in Anspruch 1 angegebenen Merkmalen gelöst. Bevorzugte Ausführungsformen ergeben sich aus den Unteransprüchen, der Beschreibung sowie den Figuren.This object is achieved by a pump unit with the features specified in claim 1. Preferred embodiments result from the dependent claims, the description and the figures.

Das erfindungsgemäße Pumpenaggregat weist in bekannter Weise einen elektrischen Antriebsmotor auf, welcher in einem Statorgehäuse angeordnet ist. In dem Statorgehäuse ist ein Stator mit elektrischen Spulen angeordnet. Im Inneren des Stators rotiert ein Rotor, welcher wiederum über eine Welle oder in anderer geeigneter Weise drehfest mit zumindest einem Laufrad des Pumpenaggregates verbunden ist. Zwischen Rotor und Stator kann darüber hinaus ein Spaltrohr oder eine Trennkalotte angeordnet sein, um den Antriebsmotor als nasslaufenden Elektromotor auszubilden. Der elektrische Antriebsmotor weist darüber hinaus einen Klemmenkasten auf, welcher mit dem Statorgehäuse an dessen Außenseite verbunden ist, Dabei kann der Klemmenkasten radial oder axial an das Statorgehäuse angesetzt sein.The pump unit according to the invention has, in a known manner, an electric drive motor which is arranged in a stator housing. A stator with electrical coils is arranged in the stator housing. A rotor rotates inside the stator, which in turn is connected in a rotationally fixed manner to at least one impeller of the pump assembly via a shaft or in some other suitable manner. In addition, a can or a separating cap can be arranged between the rotor and the stator in order to design the drive motor as a wet-running electric motor. The electric drive motor points above it addition, a terminal box which is connected to the stator housing on its outside. The terminal box can be attached radially or axially to the stator housing.

Erfindungsgemäß ist der Klemmenkasten so ausgebildet, dass er in seinem Inneren zumindest eine Trennwand aufweist. Diese teilt den Innenraum des Klemmenkastens, welcher von den Außenwandungen des Klemmenkastens begrenzt wird, in zumindest zwei Bereiche, nämlich einen Elektronikbereich und einen Anschlussbereich, In dem Elektronikbereich sind die elektrischen und elektronischen Bauteile angeordnet, welche üblicherweise in solchen Klemmenkästen angeordnet sind. Dies können insbesondere elektronische Bauteile zur Motorsteuerung sein, beispielsweise Teile eines Frequenzumrichters oder zur Spannungsanpassung für den Antriebsmotor. In dem Anschlussbereich sind die elektrischen Anschlüsse zum Anschluss des Klemmenkastens angeordnet.According to the invention, the terminal box is designed in such a way that it has at least one partition in its interior. This divides the interior of the terminal box, which is delimited by the outer walls of the terminal box, into at least two areas, namely an electronics area and a connection area. The electrical and electronic components that are usually arranged in such terminal boxes are arranged in the electronics area. In particular, these can be electronic components for motor control, for example parts of a frequency converter or for voltage adjustment for the drive motor. The electrical connections for connecting the terminal box are arranged in the connection area.

Der Anschlussbereich grenzt an eine Aussenwandung des Klemmenkastens an, in welcher zumindest eine Kabeldurchführung ausgebildet ist.The connection area borders on an outer wall of the terminal box, in which at least one cable bushing is formed.

Dabei sind in dem Anschlussbereich zum einen die elektrischen Anschlüsse für zumindest eine Anschlussleitung, beispielsweise ein Netzkabel angeordnet. Zum anderen ist jedoch erfindungsgemäß vorgesehen, dass in demselben Anschlussbereich auch Kontakte zur elektrischen Verbindung mit elektrischen oder elektronischen Bauteilen vorhanden sind, welche im Inneren des Statorgehäuses angeordnet sind. Dies sind beispielsweise die Statorspulen oder aber weitere elektrische oder elektronische Bauelemente im Inneren des Statorgehäuses. D.h. in dem Anschlussbereich sind auch die elektrischen Anschlüsse zur Verbindung des Klemmenkastens mit dem Stator im Inneren des Statorgehäuses angeordnet. Dies hat den Vorteil, dass zwei wesentliche elektrische Anschlüsse, welcher ein solcher Klemmenkasten aufweist, nämlich die Anschlüsse für eine Anschlussleitung zur Stromversorgung und die Anschlüsse zur Verbindung mit dem Stator, in einem gemeinsamen von den übrigen elektronischen Bauteilen getrennten Anschlussbereich des Klemmenkastens verlegt werden. Dies vereinfacht die Abdichtung des Klemmenkastens, da nur dieser Anschlussbereich nach außen abgedichtet werden muss. Es ist kein weiterer Anschlussbereich erforderlich, welcher mit einem abnehmbaren Deckel verschlossen werden muss, wie es bei bekannten Anordnungen zum elektrischen Anschluss des Klemmenkastens mit einer Anschlussleitung vorgesehen ist.On the one hand, the electrical connections for at least one connection line, for example a mains cable, are arranged in the connection area. On the other hand, however, it is provided according to the invention that contacts for the electrical connection to electrical or electronic components, which are arranged inside the stator housing, are also present in the same connection area. These are, for example, the stator coils or other electrical or electronic components inside the stator housing. This means that the electrical connections for connecting the terminal box to the stator inside the stator housing are also arranged in the connection area. This has the advantage that two essential electrical connections that such a terminal box has, namely the connections for a connection line for the power supply and the connections for connection to the stator, are laid in a common connection area of the terminal box that is separate from the other electronic components. This simplifies the sealing of the terminal box, as only this connection area is sealed from the outside must become. No further connection area is required, which has to be closed with a removable cover, as is provided in known arrangements for the electrical connection of the terminal box with a connection line.

Die Trennwand bildet idealerweise in dem übrigen Bereich des Klemmenkastens einen geschlossenen Elektronikbereich aus, sodass die weiteren elektronischen Bauteile im Inneren dieses Elektronikbereiches geschützt sind, auch wenn der Anschlussbereich zur Verbindung einer Anschlussleitung mit den dort angeordneten elektrischen Anschlüssen geöffnet werden muss.The partition wall ideally forms a closed electronics area in the remaining area of the terminal box, so that the other electronic components inside this electronics area are protected, even if the connection area has to be opened to connect a connection line to the electrical connections arranged there.

Der Anschlussbereich ist dem Statorgehäuse zugewandt. Dies ist vorteilhaft, da in dem Anschlussbereich, wie vorangehend beschrieben auch Kontakte zur elektrischen Verbindung mit den im Inneren des Statorgehäuses angeordneten elektronischen und/oder elektrischen Bauelementen angeordnet sind. Auf diese Weise können diese Kontakte direkt mit korrespondierenden Kontakten oder Anschlüssen an dem Statorgehäuse in Eingriff gebracht werden.The connection area faces the stator housing. This is advantageous because, as described above, contacts for the electrical connection to the electronic and/or electrical components arranged inside the stator housing are also arranged in the connection area. In this way, these contacts can be engaged directly with corresponding contacts or terminals on the stator housing.

Ferner ist der Anschlussbereich zu dem Statorgehäuse hin offen ausgebildet und wird durch das angrenzende Statorgehäuse oder einen das Statorgehäuse verschließenden Deckel verschlossen. Dies hat den Vorteil, dass der Anschlussbereich erfindungsgemäss sehr einfach geöffnet werden kann, dem der Klemmenkasten von dem Statorgehäuse abgenommen wird. Dann ist der Anschlussbereich in dem Klemmenkasten von der sonst dem Statorgehäuse zugewandten Seite her erfindungsgemäss zugänglich, sodass dort eine Anschlussleitung angeschlossen werden kann. Durch Aufsetzen des Klemmenkastens auf das Statorgehäuse wird der Anschlussbereich des Klemmenkastens dann nach außen verschlossen. Dazu kann weiter bevorzugt zwischen dem Klemmenkasten und dem Statorgehäuse oder einem das Statorgehäuse verschließenden Deckel eine Dichtung angeordnet sein, welche der Abdichtung des Anschlussbereiches nach außen dient, sodass von außen keine Feuchtigkeit in diesen Bereich und damit in das Innere des Klemmenkastens oder das Statorgehäuse eindringen kann.Furthermore, the connection area is designed to be open towards the stator housing and is closed by the adjoining stator housing or by a cover closing the stator housing. This has the advantage that, according to the invention, the connection area can be opened very easily by removing the terminal box from the stator housing. According to the invention, the connection area in the terminal box is then accessible from the side that otherwise faces the stator housing, so that a connection line can be connected there. By placing the terminal box on the stator housing, the connection area of the terminal box is then closed to the outside. For this purpose, preferably between the terminal box and the stator housing or a cover closing the stator housing a seal may be arranged, which serves to seal the connection area from the outside, so that no moisture can penetrate from the outside into this area and thus into the interior of the terminal box or the stator housing.

Besonders bevorzugt ist der Klemmenkasten an eine axiale Stirnseite des Statorgehäuses angesetzt. Dabei kann der Klemmenkasten eine äußere Form aufweisen, welche der Außenform des Statorgehäuses entspricht, sodass ein harmonischer Übergang zwischen Statorgehäuse und Klemmenkasten erreicht werden kann. Das Statorgehäuse ist vorzugsweise rohrförmig mit kreisförmigem Querschnitt ausgebildet. Der Klemmenkasten kann entsprechend ebenfalls kreisförmig mit gleichem Durchmesser wie das Axialende des Statorgehäuses ausgebildet sein, sodass der Klemmenkasten sich bündig an das Axialende des Statorgehäuses anschließen kann. Die runde bzw. kreisförmige Form hat den vorteil, dass die Anlagefläche zwischen Statorgehäuse und Klemmenkasten sehr einfach durch eine umfängliche Dichtung abgedichtet werden kann. Diese kann als O-Ring ausgebildet sein oder beispielsweise auch an den Klemmenkasten oder das Statorgehäuse im Spritzguss angespritzt sein. Letzteres bietet sich insbesondere dann an, wenn Statorgehäuse und/oder Klemmenkasten aus Kunststoff gefertigt werden.The terminal box is particularly preferably attached to an axial end face of the stator housing. The terminal box can have an outer shape that corresponds to the outer shape of the stator housing, so that a harmonious transition between the stator housing and the terminal box can be achieved. The stator housing is preferably tubular with a circular cross section. Accordingly, the terminal box can also be circular with the same diameter as the axial end of the stator housing, so that the terminal box can be connected flush to the axial end of the stator housing. The round or circular shape has the advantage that the contact surface between the stator housing and the terminal box can be easily sealed with a circumferential seal. This can be in the form of an O-ring or, for example, it can also be injection molded onto the terminal box or the stator housing. The latter is particularly useful when the stator housing and/or terminal box are made of plastic.

Die elektrischen Anschlüsse für die Anschlussleitung im Inneren des Anschlussbereiches sind vorzugsweise als Anschlussklemmen oder Stecckontakte ausgebildet. Dies ermöglicht es, die Anschlussleitung idealerweise ohne Werkzeug mit den elektrischen Anschlüssen zu kontaktieren.The electrical connections for the connection line inside the connection area are preferably designed as connection terminals or plug-in contacts. This makes it possible to contact the connecting cable with the electrical connections, ideally without tools.

Die dazu erforderlichen Anschlussklemmen oder Steckkontakte erstrecken sich vorzugsweise durch die Trennwand hindurch. D.h. die Anschlussklemmen oder Steckkontakte sind elektrisch leitend mit elektrischen bzw. elektronischen Bauteilen Im Inneren des Elektronikbereiches verbunden. Besonders bevorzugt sind die Anschlussklemmen oder Steckkontakte direkt auf einer Leiterplatte, welche sich im Elektronikbereich befindet, angeordnet. Dann können sich die Anschlussklemmen oder Steckkontakte so durch die Trennwand hindurcherstrecken, dass diejenigen Bereiche der Anschlussklemmen oder Steckkontakte, welcher mit einer Anschlussleitung kontaktiert werden müssen im Anschlussbereich des Klemmenkastens gelegen sind. Auch erforderliche Bedienelemente wie Hebel zum Öffnen und/oder Schließen der Anschlussklemmen sind dann vorzugsweise im Anschlussbereich gelegen. So kann die Anschlussleitung mit Anschlussklemmen oder Steckkontakten verbunden werden, ohne den Elektronikbereich öffnen zu müssen. Gleichzeitig wird aber von den Anschlussklemmen die elektrische Verbindung in den Elektronikbereich hergestellt, Darüber hinaus ist die Anordnung der Anschlussklemmen und Steckkontakte sehr einfach, da diese mit weiteren elektrischen und elektronischen Bauteilen auf einer Leiterplatte, welche im Elektronikbereich angeordnet ist, platziert werden können. Damit sich die Anschlussklemmen oder Steckkontakte durch die Trennwand hindurcherstrecken können, kann diese eine Öffnung aufweisen. In dem Bereich dieser Öffnung kann gegebenenfalls auch noch eine Dichtung angeordnet sein. Alternativ wäre es auch möglich, die Anschlussklemmen oder Steckkontakte direkt in der Trennwand auszubilden und die Trennwand dann an ihrer dem Elektronikbereich zugewandten Seite an einer dort angeordneten Leiterplatte zu befestigen. So könnte die Zahl der erforderlichen Bauteile reduziert werden.The connection terminals or plug contacts required for this preferably extend through the partition wall. This means that the connection terminals or plug-in contacts are electrically conductively connected to electrical or electronic components inside the electronics area. The connection terminals or are particularly preferred Plug contacts arranged directly on a printed circuit board, which is located in the electronics area. The connection terminals or plug-in contacts can then extend through the partition in such a way that those areas of the connection terminals or plug-in contacts which have to be contacted with a connecting line are located in the connection area of the terminal box. Necessary operating elements such as levers for opening and/or closing the connection terminals are then preferably located in the connection area. In this way, the connection cable can be connected to connection terminals or plug-in contacts without having to open the electronics area. At the same time, however, the electrical connection to the electronics area is established by the connection terminals. In addition, the arrangement of the connection terminals and plug contacts is very simple, since these can be placed with other electrical and electronic components on a printed circuit board, which is arranged in the electronics area. In order that the connection terminals or plug-in contacts can extend through the partition wall, it can have an opening. If necessary, a seal can also be arranged in the area of this opening. Alternatively, it would also be possible to form the connection terminals or plug-in contacts directly in the partition and then to fasten the partition on its side facing the electronics area to a printed circuit board arranged there. In this way, the number of components required could be reduced.

Die Anschlussklemmen zum Anschluss der Anschlussleitung weisen bevorzugt einen Hebel zum Öffnen der Klemmen auf. Zum Öffnen der Klemmen wird der Hebel vorzugsweise gegen eine Federvorspannung geöffnet, wodurch Anschlussöffnungen der Klemmen frei gegeben werden, in welche die elektrischen Leiter einer Anschlussleitung eingeschoben werden, Beim Loslassen des Hebels wird dieser dann vorzugsweise durch Federkraft wieder in seine Ausgangslage zurückbewegt und im Inneren werden die Leiter des Anschlusskabels geklemmt. Bevorzugt ist der Hebel so angeordnet, dass er zum Öffnen zu einer Kabeldurchführung in einer Wandung des Anschlussraumes hin bewegbar ist. Dabei ist die Anschlussklemme vorzugsweise gegenüberliegend zu der Kabeldurchführung angeordnet, sodass die Öffnungen, in welche die Leiter des Kabels eingeschoben werden, der Kabeldurchführung gegenüberliegen. Wenn dann der Hebel zum Öffnen der Klemmen in Richtung der Kabeldurchführung gedrückt werden muss, hat dies den Vorteil, dass der Hebel mit dem Klemmenkasten mit einer Hand ergriffen werden kann und auf das Kabel zu bewegt werden kann. Dabei kann der Hebel sehr einfach in der geöffneten Stellung gehalten werden.The connection terminals for connecting the connection line preferably have a lever for opening the terminals. To open the terminals, the lever is preferably opened against a spring preload, whereby connection openings of the terminals are released, into which the electrical conductors of a connecting line are inserted. When the lever is released, it is then moved back to its original position, preferably by spring force and inside the conductors of the connection cable are clamped. The lever is preferably arranged in such a way that, in order to open it, it can be moved towards a cable bushing in a wall of the connection space. In this case, the connection terminal is preferably arranged opposite the cable bushing, so that the openings into which the conductors of the cable are inserted are opposite the cable bushing. If the lever then has to be pushed in the direction of the cable bushing to open the terminals, this has the advantage that the lever with the terminal box can be gripped with one hand and moved towards the cable. The lever can be held in the open position very easily.

Die Kontakte zur elektrischen Verbindung mit den elektrischen oder elektronischen Bauteilen im Inneren des Statorgehäuses sind weiter bevorzugt als Steckkontakte ausgebildet, welche mit korrespondierenden Steckkontakten an dem Stator oder Statorgehäuse im Eingriff sind. Dies ermöglicht es, sehr einfach den Klemmenkasten auf das Statorgehäuse aufzustecken, wobei dann die Steckkontakte zwischen Klemmenkasten und Stator elektrisch leitend miteinander in Eingriff treten. Es ist insbesondere dann von Vorteil, wenn der Klemmenkasten auch zum Anschluss der Anschlussleitung vom Statorgehäuse abgenommen werden muss, da so diese Verbindung leicht getrennt und wieder zusammengeführt werden kann.The contacts for the electrical connection to the electrical or electronic components inside the stator housing are more preferably designed as plug contacts which engage with corresponding plug contacts on the stator or stator housing. This makes it possible to easily plug the terminal box onto the stator housing, the plug contacts between the terminal box and the stator then engaging with one another in an electrically conductive manner. It is particularly advantageous if the terminal box also has to be removed from the stator housing in order to connect the connecting cable, since this connection can then be easily separated and reconnected.

Der Anschlussbereich grenzt erfindungsgemäss an eine Außenwandung des Klemmenkastens an, in welcher zumindest eine Kabeldurchführung ausgebildet ist. Dabei ist dies vorzugsweise eine Außenwandung, welche dem Statorgehäuse abgewandt ist. Wenn der Klemmenkasten an das axiale Stirnende des Statorgehäuses angesetzt wird, kann der Klemmenkasten topfförmig ausgebildet sein, wobei er mit seiner offenen Seite an die Stirnseite des Statorgehäuses angesetzt wird.According to the invention, the connection area borders on an outer wall of the terminal box, in which at least one cable bushing is formed. In this case, this is preferably an outer wall which faces away from the stator housing. If the terminal box is attached to the axial end face of the stator housing, the terminal box can be cup-shaped, with its open side being attached to the end face of the stator housing.

Die Kabeldurchführung ist dann vorzugsweise in einer Umfangswandung des Klemmenkastens ausgebildet. Insofern grenzt der Anschlussbereich dann vorzugsweise an die offene, dem Statorgehäuse zugewandte Seite und diese Umfangswandung mit der Kabeldurchführung an.The cable bushing is then preferably in a peripheral wall of the terminal box. In this respect, the connection area then preferably borders on the open side facing the stator housing and on this peripheral wall with the cable bushing.

Die Kabeldurchführung kann in bekannter Weise eine Dichtung und/oder Zugentlastung für das Anschlusskabel aufweisen,The cable bushing can have a seal and/or strain relief for the connection cable in a known manner,

Im Anschlussbereich können neben den elektrischen Anschlüssen, welche vorangehend beschrieben wurden, auch noch Bedienelemente angeordnet sein. So kann beispielsweise ein Stellelement zum Einstellen der Drehzahl des Antriebsmotors dort angeordnet sein. Dabei kann ein solches Einstellelement so ausgebildet sein, dass es vom Anschlussbereich her betätigt bzw. einstellbar ist und sich durch die Trennwand hindurch in den Elektronikbereich erstreckt, in dem dann ein entsprechendes elektrisches oder elektronisches Bauelement vorgesehen ist, welches eine Stellbewegung in eine elektrische Größe umsetzt. Beispielsweise kann hier ein Potentiometer vorgesehen werden, welches mittels einer im Anschlussbereich angeordneten Stellschraube gedreht werden kann. Hierzu kann sich die Stellschraube oder eine Welle durch die Trennwand hindurcherstrecken.In addition to the electrical connections, which have been described above, operating elements can also be arranged in the connection area. For example, an adjusting element for adjusting the speed of the drive motor can be arranged there. Such an adjustment element can be designed so that it can be actuated or adjusted from the connection area and extends through the partition wall into the electronics area, in which a corresponding electrical or electronic component is then provided, which converts an adjustment movement into an electrical variable . For example, a potentiometer can be provided here, which can be turned by means of an adjusting screw arranged in the connection area. For this purpose, the adjusting screw or a shaft can extend through the partition.

Gemäß einer weiteren bevorzugten Ausführungsform erstreckt sich die Trennwand zumindest in einem Abschnitt schräg zu den Außenseiten, insbesondere den Stirnseiten des Klemmenkastens. Auf diese Weise kann erreicht werden, dass der Anschlussbereich in dem Bereich, in welchem eine Kabeldurchführung mündet, eine größere Höhe aufweist, als in den anderen Bereichen. Im Bereich der Kabeldurchführung ist gegebenenfalls eine größere Höhe oder Tiefe des Anschlussbereiches erforderlich, da die Kabeldurchführung vorzugsweise in einer Seiten- oder Umfangswandung des Klemmenkastens angeordnet ist.According to a further preferred embodiment, the partition wall extends at least in one section obliquely to the outer sides, in particular the end faces of the terminal box. In this way it can be achieved that the connection area has a greater height in the area in which a cable bushing opens than in the other areas. A greater height or depth of the connection area may be required in the area of the cable bushing, since the cable bushing is preferably arranged in a side or peripheral wall of the terminal box.

Wie beschrieben, ist der Klemmenkasten vorzugsweise topfförmig mit einer offenen Seite ausgebildet, welche durch das Statorgehäuse oder einen das Statorgehäuse verschließenden Deckel verschlossen wird. Dazu wird der Klemmenkasten mit der offenen Seite auf das Statorgehäuse, vorzugsweise an dessen axialer Stirnseite aufgesetzt. Im Umfang der Öffnung des Klemmenkastens kann eine Dichtung vorgesehen sein oder eine Dichtfläche, an welcher eine an dem Statorgehäuse angeordnete Dichtung zur Abdichtung zur Anlage kommt. Bei dieser topfförmigen Ausgestaltung erstreckt sich die Trennwand vorzugsweise schräg zu der offenen Stirnseite des Topfes. Auf diese Weise kann erreicht werden, dass ein Anschlussbereich geschaffen wird, welcher sich an der Seite der Kabeldurchführung, welche vorzugsweise an einer Umfangswandung des Topfes vorgesehen ist, eine größere axiale Höhe aufweist, sodass von dieser Seite her das Kabel in den Anschlussbereich eingeführt werden kann. Die schräge Trennwand liegt dabei weiter bevorzugt der Kabeldurchführung gegenüber, sodass ein in die Kabeldurchführung von außen eingeschobenes Kabel von der schrägen Trennwand vorzugsweise in seiner Richtung umgelenkt wird, sodass es von der Öffnung des Klemmenkastens her leicht ergriffen und in eine Anschlussklemme eingeführt werden kann.As described, the terminal box is preferably pot-shaped with an open side, which is closed by the stator housing or a cover closing the stator housing. For this purpose, the terminal box is placed with the open side on the stator housing, preferably on its axial end face. A seal can be provided on the circumference of the opening of the terminal box or a sealing surface against which a seal arranged on the stator housing comes to rest for sealing purposes. In this pot-shaped configuration, the dividing wall preferably extends obliquely to the open end face of the pot. In this way, a connection area can be created which has a greater axial height on the side of the cable bushing, which is preferably provided on a peripheral wall of the pot, so that the cable can be inserted into the connection area from this side . The sloping partition wall is more preferably located opposite the cable bushing, so that a cable pushed into the cable bushing from the outside is preferably deflected in its direction by the sloping partition wall, so that it can be easily grasped from the opening of the terminal box and inserted into a connection terminal.

Die Trennwand ist vorzugsweise ein in den Klemmenkasten eingesetztes separates Bauteil, welches mit den Wandungen des Klemmenkastens vorzugsweise über Rastverbindung verbunden ist. Dies ermöglicht eine einfache Fertigung und Montage des Klemmenkastens. So können zunächst die elektronischen Bauteile in dem Elektronikbereich oder an der Trennwand angeordnet werden und die Trennwand dann In den Klemmenkasten eingesetzt werden, wodurch der Elektronikbereich verschlossen und von dem Anschlussbereich getrennt wird. Gegebenenfalls kann zwischen der Trennwand und der angrenzenden Wandung des Klemmenkastens eine Dichtung zur Abdichtung des Elektronikbereiches angeordnet sein, Die Verbindung über Rastverbindungen ermöglicht eine sehr einfache Montage.The partition wall is preferably a separate component which is inserted into the terminal box and is connected to the walls of the terminal box, preferably by means of a snap-in connection. This enables simple manufacture and assembly of the terminal box. Thus, the electronic components can first be arranged in the electronics area or on the partition and the partition can then be inserted into the terminal box, as a result of which the electronics area is closed and separated from the connection area. If necessary, a seal can be placed between the partition and the adjacent wall of the terminal box to seal off the electronics area be arranged, the connection via snap-in connections enables very simple assembly.

Gemäß einer besonderen Ausführungsform der Erfindung trägt die Trennwand zumindest eine In dem Elektronikraum angeordnete Leiterplatte. Dadurch vereinfacht sich die Montage noch weiter, da die Leiterplatte vor dem Einsetzen der Trennwand an dieser Trennwand befestigt werden kann und dann gemeinsam mit der Trennwand in den Klemmenkasten eingesetzt werden kann. So entfällt eine separate Fixierung und Montage der Leiterplatte im Inneren des Klemmenkastens. Ferner kann ein Anschluss. insbesondere ein Anschlussstecker zur Verbindung mit den elektrischen oder elektronischen Bauteilen im Inneren des Statorgehäuses ebenfalls an der Trennwand ausgebildet werden. Dann kann dieser elektrische Anschluss direkt mit der Leiterplatte auf der anderen Seite der Trennwand verbunden werden. Besonders bevorzugt kann sich die Leiterplatte jedoch durch eine Öffnung in der Trennwand mit einem einen Steckkontakt bildenden Abschnitt hindurcherstrecken. Dies ist vorzugsweise eine Seiten- oder Stirnkante der Leiterplatte, wobei an diese Stirn- oder Seitenkante angrenzend auf einer oder zwei entgegengesetzten Oberfläche der Leiterplatte elektrische Kontakte ausgebildet sind, welche mit einem Anschlussstecker am Statorgehäuse kontaktierbar sind.According to a particular embodiment of the invention, the partition carries at least one printed circuit board arranged in the electronics space. This simplifies assembly even further, since the printed circuit board can be fastened to this partition before inserting the partition and can then be inserted into the terminal box together with the partition. This eliminates the need for separate fixing and assembly of the printed circuit board inside the terminal box. Furthermore, a connection. in particular a connector plug for connection to the electrical or electronic components inside the stator housing can also be formed on the partition. Then this electrical connection can be connected directly to the circuit board on the other side of the partition. Particularly preferably, however, the printed circuit board can extend through an opening in the partition wall with a section forming a plug contact. This is preferably a side or front edge of the printed circuit board, with electrical contacts being formed adjacent to this front or side edge on one or two opposite surfaces of the printed circuit board, which can be contacted with a connector plug on the stator housing.

Das Pumpenaggregat ist, wie oben beschrieben, vorzugsweise ein Umwälzpumpenaggregat, insbesondere ein Heizungs- oder Brauchwasser-Umwälzpumpenaggregat. Der Antriebsmotor kann vorzugsweise ein Spaltrohrmotor oder Kugelmotor mit einer Trennkalotte sein. In einem solchen Spaltrohrmotor ist zwischen dem Stator und dem Rotor ein den Statorraum von dem Rotorraum trennendes Spaltrohr angeordnet. Im Sinne der Erfindung ist dabei unter einem Spattrohr jedes zur Trennung von Rotorraum und Statorraum geeignetes Element zu verstehen, unabhängig von seiner Form. So kann ein Spaltrohr auch scheiben- oder kalottenförmig ausgebildet sein.As described above, the pump unit is preferably a circulating pump unit, in particular a heating or service water circulating pump unit. The drive motor can preferably be a canned motor or spherical motor with a separating cap. In such a canned motor, a can separating the stator space from the rotor space is arranged between the stator and the rotor. Within the meaning of the invention, a spat tube is to be understood as meaning any element suitable for separating the rotor space and the stator space, independently from its shape. A split tube can also be designed in the shape of a disk or a dome.

Nachfolgend wird die Erfindung beispielhaft anhand der beigefügten Zeichnungen beschrieben. In diesen zeigt:

Fig. 1
eine teilweise explodierte Schnittansicht eines erfindungsgemäßen Pumpenaggregates,
Fig. 2
eine Schnittansicht des Klemmenkastens des Pumpenaggregates gemäß Fig. 1 und
Fig. 3
im Schnitt einen Klemmenkasten gemäß einer alternativen Ausführungsform,
The invention is described below by way of example with reference to the accompanying drawings. In these shows:
1
a partially exploded sectional view of a pump unit according to the invention,
2
a sectional view of the terminal box of the pump unit according to 1 and
3
in section a terminal box according to an alternative embodiment,

Das Pumpenaggregat in Fig. 1 weist in bekannter Weise ein Statorgehäuse 2 auf, welches im Wesentlichen rohrförmig ausgebildet ist und in dessen Inneren ein Stator 4 mit den üblichen Eisenteilen und Statorspulen angeordnet ist. Der Stator 4 umgibt eine Trennkalotte bzw. ein Spaltrohr 6, welches gleichzeitig das Axialende des Statorgehäuses 2 umschließt, indem es nach außen umgebogen und um die axiale Stirnseite des Statorgehäuses 2 gebördelt ist. Im Inneren des Spaltrohres 6 ist ein Rotor 8 drehbar gelagert. Bei der hier gezeigten Ausführungsform handelt es sich um einen Kugelmotor, bei welchem der Rotor 8 halbkugelförmig und das Spaltrohr 6 in Form einer Trennkalotte entsprechend halbkugelförmig bzw. kalottenförmig ausgebildet ist. In dem Rotor 8 ist integriert ein Laufrad 10 ausgebildet. Dies greift in ein hier nicht gezeigtes Pumpengehäuse ein. Das Statorgehäuse 2 wird mit dem Pumpengehäuse mittels einer Überwurfmutter 12 verbunden. An dem Statorgehäuse 2 ist ein topfförmiger Klemmenkasten 14 angesetzt. An dem hier gezeigten Ausführungsbeispiel ist das Statorgehäuse 2 an dieser Axialseite zusätzlich durch einen Deckel 16 verschlossen. Es ist jedoch zu verstehen, dass das Statorgehäuse 2 auch direkt durch den Klemmenkasten 14 verschlossen werden könnte. Der Klemmenkasten weist einen Außendurchmesser auf, welcher im Wesentlichen dem Außendurchmesser des Statorgehäuses 2 bzw. dessen Ummantelung entspricht. So wird insgesamt ein im Wesentlichen zylindrisches Pumpenaggregat geschaffen.The pump unit in 1 has, in a known manner, a stator housing 2 which is essentially tubular and inside which a stator 4 with the usual iron parts and stator coils is arranged. The stator 4 surrounds a separating cap or a can 6, which at the same time encloses the axial end of the stator housing 2 by being bent outwards and flanged around the axial end face of the stator housing 2. Inside the can 6, a rotor 8 is rotatably mounted. The embodiment shown here is a spherical motor in which the rotor 8 is hemispherical and the can 6 is correspondingly hemispherical or dome-shaped in the form of a separating cap. An impeller 10 is integrated into the rotor 8 . This engages in a pump housing not shown here. The stator housing 2 is connected to the pump housing by means of a union nut 12. A pot-shaped terminal box 14 is attached to the stator housing 2 . In the exemplary embodiment shown here, the stator housing 2 is additionally closed by a cover 16 on this axial side. However, it is to be understood that the stator housing 2 could also be closed directly by the terminal box 14. The terminal box has an outer diameter which essentially corresponds to the outer diameter of the stator housing 2 or its casing. In this way, an essentially cylindrical pump unit is created overall.

Im Inneren des Statorgehäuses 2 ist darüber hinaus eine Leiterplatte 18 angeordnet, welche die Spulen des Stators 4 elektrisch kontaktiert und gegebenenfalls elektronische oder elektrische Bauelemente, beispielsweise einer Motorsteuerung trägt. Die Leiterplatte 18 ist mit einem Anschlussstecker 20 versehen, welcher den Deckel 16 durchgreift. Der Anschlussstecker 20 dient der Kontaktierung mit den elektrischen und elektronischen Bauelementen im Inneren des Klemmenkastens 14.In addition, inside the stator housing 2 there is a printed circuit board 18 which makes electrical contact with the coils of the stator 4 and optionally carries electronic or electrical components, for example a motor controller. The printed circuit board 18 is provided with a connector plug 20 which extends through the cover 16 . The connector plug 20 is used to make contact with the electrical and electronic components inside the terminal box 14.

Der in Fig. 2 in einer Einzelansicht gezeigte Klemmenkasten 14 des Pumpenaggregates weist eine topfförmige Außenwandung auf, bestehend aus einer ringförmigen Umfangswandung 22 und einem sich quer erstreckenden Boden 24. Die Umfangswandung 22 erstreckt sich um die Längs- bzw. Drehachse X, der Boden 24 erstreckt sich im Wesentlichen quer hierzu an einem Axialende der Umfangswandung 22. Die Umfangswandung 22 und der Boden 24 sind vorzugsweise einstückig aus Kunststoff ausgebildet. An dem dem Boden 24 entgegengesetzten Axialende 26 ist der Klemmenkasten 14 offen ausgebildet. Das offene Axialende 26 wird vom Statorgehäuse 2 verschlossen, wenn dieses mit dem Klemmenkasten 14 verbunden ist. Dazu ist am Statorgehäuse eine umfängliche Dichtung 28 zugeordnet, welche am Innenumfang der Umfangswandung 22 im Bereich des Axialendes 26 dichtend zur Anlage kommt.the inside 2 The terminal box 14 of the pump unit shown in an individual view has a pot-shaped outer wall, consisting of an annular peripheral wall 22 and a base 24 extending transversely. The peripheral wall 22 extends about the longitudinal or axis of rotation X, the base 24 extends essentially transversely for this purpose at an axial end of the peripheral wall 22. The peripheral wall 22 and the bottom 24 are preferably formed in one piece from plastic. At the axial end 26 opposite the base 24, the terminal box 14 is open. The open axial end 26 is closed by the stator housing 2 when it is connected to the terminal box 14 . For this purpose, a circumferential seal 28 is assigned to the stator housing, which seal comes to rest on the inner circumference of the circumferential wall 22 in the region of the axial end 26 .

Im Inneren des Klemmenkastens 14 ist eine Trennwand 30 angeordnet. Diese teilt den Innenraum des Klemmenkastens 14 in zwei Bereiche, nämlich einen Elektronikbereich 32 und einen Anschlussbereich 34. Dabei weist die Trennwand 30 zwei Abschnitte 30a und 30b auf. Der Abschnitt 30a erstreckt sich im Wesentlichen parallel zum Boden 24, d.h. quer zur Längsachse X in der Nähe des offenen Axialendes 26. Ausgehend von diesem Abschnitt 30a erstreckt sich der Abschnitt 30b gewinkelt zur Umfangswandung 22 und zum Boden 24. Dort wo sich der Abschnitt 30a der Trennwand 30 erstreckt, weist der Anschlussbereich 34 nur eine geringe axiale Höhe in Richtung der Längsachse X auf, welche sich dann in dem Bereich, in welchem sich der Abschnitt 30b der Trennwand 30 schräg erstreckt bis zur gegenüberliegenden Umfangswandung 22 vergrößert. In dieser Umfangswandung ist eine Kabeldurchführung 36 ausgebildet, durch welche ein Anschlusskabel in den Anschlussbereich 34 im Inneren des Klemmenkastens 14 geführt werden kann. Die Kabeldurchführung 36 liegt dem schrägen Abschnitt 30b der Trennwand 30 gegenüber.A partition wall 30 is arranged inside the terminal box 14 . This divides the interior of the terminal box 14 into two areas, namely an electronics area 32 and a connection area 34. The partition wall 30 has two sections 30a and 30b. The section 30a extends substantially parallel to the bottom 24, ie transversely to the longitudinal axis X in the vicinity of the open axial end 26. Starting from this section 30a, the section 30b extends at an angle to the peripheral wall 22 and the bottom 24. Where the section 30a of the partition wall 30, the connection area 34 has only a small axial height in the direction of the longitudinal axis X, which then increases in the area in which the section 30b of the partition wall 30 extends obliquely to the opposite peripheral wall 22. A cable bushing 36 is formed in this peripheral wall, through which a connection cable can be routed into the connection area 34 inside the terminal box 14 . The grommet 36 faces the inclined portion 30b of the bulkhead 30 .

In dem Elektronikbereich 32 ist eine Leiterplatte 38 angeordnet, welche elektronische Bauteile zur Steuerung und/oder Spannungsversorgung des Elektromotors trägt. Diese elektronischen Bauteile 40 können beispielsweise einen Spannungswandler beinhalten. Die Leiterplatte 38 erstreckt sich quer zu dem Boden 24 im Wesentlichen parallel zur Längsachse X und greift durch eine Öffnung 42 in der Trennwand 30. Auf diese Weise wird die Leiterplatte 38 an der Trennwand 30 fixiert. Der Abschnitt 44 der Leiterplatte 38, welcher sich durch die Öffnung 42 hindurchersireckt und in den Anschlussbereich 34 hineinragt, bildet einen Steckkontakt bzw. Steckbereich. Dazu sind angrenzend an diese Stirnkante der Leiterplatte elektrische Kontakte auf deren Oberflächen aufgebracht, welche mit elektrischen Kontakten in dem Anschlussstecker 20 in Eingriff treten können, wenn der Klemmenkasten 14 auf das Statorgehäuse 2 aufgesetzt wird. Dann greift der Abschnitt 44 der Leiterplatte 38 elektrisch kontaktierend in den Anschlussstecker 20 ein. Auf diese Weise wird eine elektrische Verbindung zwischen den elektrischen und elektronischen Bauteilen in dem Elektronikbereich 32 und elektronischen Bauteilen in dem Elektronikbereich 32 des Klemmenkastens 14 und den elektrischen und elektronischen Bauteilen im Inneren des Statorgehäuses 2 hergestellt. Die elektrischen oder elektronischen Bauteile im Inneren des Statorgehäuses 2 sind insbesondere auf der Leiterplatte 18 angeordnet oder über diese elektrisch kontaktiert, wie beispielsweise die Spulen. Dieser Anschluss zur Verbindung des Klemmenkastens mit den elektrischen und elektronischen Bauteilen im Inneren des Stators wird somit von dem Abschnitt 44 der Leiterplatte 38 gebildet, welcher in dem Anschlussbereich 34 gelegen ist,A printed circuit board 38 is arranged in the electronics area 32 and carries electronic components for controlling and/or supplying voltage to the electric motor. These electronic components 40 can contain a voltage converter, for example. The printed circuit board 38 extends transversely to the floor 24 essentially parallel to the longitudinal axis X and reaches through an opening 42 in the partition wall 30. The printed circuit board 38 is fixed to the partition wall 30 in this way. The section 44 of the printed circuit board 38, which extends through the opening 42 and protrudes into the connection area 34, forms a plug-in contact or plug-in area. For this purpose, electrical contacts are applied to the surfaces adjacent to this front edge of the printed circuit board, which can engage with electrical contacts in the connector plug 20 when the terminal box 14 is placed on the stator housing 2 . Then the section 44 of the printed circuit board 38 engages in the connector plug 20 in an electrically contacting manner. In this way, an electrical connection between the electrical and electronic components in the electronics area 32 and electronic components in the electronics area 32 of the terminal box 14 and the electrical and electronic components inside the stator housing 2 are produced. The electrical or electronic components inside the stator housing 2 are arranged in particular on the circuit board 18 or are electrically contacted via it, such as the coils. This connection for connecting the terminal box to the electrical and electronic components inside the stator is thus formed by the section 44 of the printed circuit board 38, which is located in the connection area 34.

Auf der Leiterplatte 38 ist darüber hinaus eine Anschlussklemme 46 angeordnet, welche die Trennwand 30 durch eine Öffnung so durchgreift, dass ein Abschnitt 46a der Anschlussklemme 46, in welchem die Öffnungen zum Einschieben der Leiter eines Anschlusskabels ausgebildet sind, im Anschlussbereich 34 gelegen sind bzw. zum Anschlussbereich 34 geöffnet sind, sodass die Leiter des Anschlusskabels im Anschlussbereich 34 in die Anschlussklemme 46 eingeführt werden können. Die Anschlussklemme 46 weist darüber hinaus einen Hebel 48 auf. welcher zum Öffnen der Anschlussklemme betätigt werden muss. Dazu ist bei dieser Ausführungsform vorgesehen, dass zum Öffnen der Anschlussklemme 46 der Hebel 48 in Richtung auf die Kabeldurchführung 36 zu bewegt werden muss, d.h. in Richtung des Pfeiles A in Figur 2. Dies hat den Vorteil, dass mit einer Hand der Klemmenkasten 14 und der Hebel 48 ergriffen werden können und mit der anderen Hand das Anschlusskabel von der anderen Seite her in den Klemmenkasten eingeschoben werden kann, sodass ein einfaches Anschließen des Kabels an der Anschlussklemme 46 möglich ist.In addition, a connecting terminal 46 is arranged on printed circuit board 38, which extends through partition 30 through an opening in such a way that a section 46a of connecting terminal 46, in which the openings for inserting the conductors of a connecting cable are formed, is located in connecting area 34 or are open to the connection area 34, so that the conductors of the connection cable in the connection area 34 can be inserted into the connection terminal 46. The connection terminal 46 also has a lever 48 . which must be pressed to open the connection terminal. For this purpose, it is provided in this embodiment that, in order to open the connection terminal 46, the lever 48 must be moved in the direction of the cable bushing 36, ie in the direction of arrow A in FIG figure 2 . This has the advantage that the terminal box 14 and the lever 48 can be gripped with one hand and the connection cable can be pushed into the terminal box from the other side with the other hand, so that the cable can be easily connected to the connection terminal 46 .

Es ist zu sehen, dass sowohl die Anschlussklemme 46 bzw. deren Abschnitt 46a mit den Öffnungen zum Einschieben eines Kabels als auch der von dem Abschnitt 44 der Leiterplatte 38 gebildete Steckbereich zum Anschluss der elektrischen Komponenten im Inneren des Statorgehöuses 2 in demselben Anschlussbereich 34 Im Inneren des Klemmenkastens 14 gelegen sind. Dies hat den Vorteil, dass der Klemmenkasten 14 nur eine Öffnung aufweisen muss, welche abgedichtet werden muss. Zum Anschluss der Anschlussleitung kann der Klemmenkasten 14 einfach vom Statorgehäuse abgenommen werden, wodurch dann der Anschlussbereich 34 zugänglich wird.It can be seen that both the connection terminal 46 or its section 46a with the openings for inserting a cable and the plug-in area formed by the section 44 of the printed circuit board 38 for connecting the electrical components inside the stator housing 2 are located in the same connection area 34 Inside the terminal box 14. This has the advantage that the terminal box 14 only has to have one opening, which has to be sealed. To connect the connecting line, the terminal box 14 can simply be removed from the stator housing, as a result of which the connection area 34 then becomes accessible.

Die Trennwand 30 ist zur Montage zunächst mit der Leiterplatte 18 verbunden, d.h. die Leiterplatte 18 wird in ihrem Abschnitt 44 durch die Öffnung 42 geführt. Anschließend wird die Trennwand 30 in den Klemmenkasten 14 eingesetzt und dort über Rastelemente 49 an der Umfangswandung 22 verrastet. So ist eine einfache Montage der Trennwand 30 mit der Leiterplatte 18 im Inneren des Klemmenkastens 14 möglich.For assembly, the partition wall 30 is first connected to the circuit board 18, i.e. the section 44 of the circuit board 18 is guided through the opening 42. The partition wall 30 is then inserted into the terminal box 14 and latched there via latching elements 49 on the peripheral wall 22 . So a simple assembly of the partition 30 with the circuit board 18 inside the terminal box 14 is possible.

Im Anschlussbereich 34 ist darüber hinaus noch ein Einstellelement in Form einer Stellschraube 50 angeordnet, über welches die Motordrehzahl eingestellt werden kann. Die Stellschraube 50 ist mit einer sich durch den Abschnitt 30a der Trennwand 30 erstreckenden Welle 52 verbunden, welche ein auf der Leiterplatte 38 angeordnetes Potentiometer 54 betätigt.In addition, an adjusting element in the form of an adjusting screw 50 is arranged in the connection area 34, via which the engine speed can be adjusted. The set screw 50 is connected to a shaft 52 which extends through the portion 30a of the bulkhead 30 and which actuates a potentiometer 54 arranged on the printed circuit board 38 .

Fig. 3 zeigt eine alternative Ausführungsform des Klemmenkastens 14, welche sich von der vorangehenden beschriebenen Ausführungsform dadurch unterscheidet, dass in dem Boden 24' zusätzliche Bedienelemente 56 und Anzeigeelemente 58 angeordnet sind. Darüber hinaus ist in einer Umfangswandung 22 angrenzend an den Elektronikbereich 32 noch ein zusätzlicher Anschlussstecker 60 ausgebildet, welcher zum Anschluss eines Sensorelementes dient. 3 shows an alternative embodiment of the terminal box 14, which differs from the embodiment described above in that additional operating elements 56 and display elements 58 are arranged in the base 24'. In addition, an additional connector plug 60 is formed in a peripheral wall 22 adjoining the electronics area 32 and is used to connect a sensor element.

BezugszeichenlisteReference List

22
- Statorgehäuse- stator housing
44
- Stator- stator
66
- Spaltrohr- cane
88th
- Rotor- Rotor
1010
- Laufrad- Wheel
1212
- Überwurfmutter- union nut
1414
- Klemmenkasten- terminal box
1616
- Deckel- Lid
1818
- Leiterplatte- circuit board
2020
- Anschlussstecker- Connection plug
2222
- Umfangswandung- peripheral wall
2424
- Boden- Floor
2626
- Axialende- axial end
2828
- Dichtung- Poetry
30, 30a, 30b30, 30a, 30b
- Trennwand- Partition wall
3232
- Elektronikbereich- electronics area
3434
- Anschlussbereich- connection area
3636
- Kabeldurchführung- Cable grommet
3838
- Leiterplatte- circuit board
4040
- Elektronische Bauteile- Electronic components
4242
- Öffnung- opening
4444
- Abschnitt- Section
46, 46a46, 46a
- Anschlussklemme- Connection terminal
4848
- Hebel- lever
5050
- Stellschraube- adjusting screw
5252
- Welle- Wave
5454
- Potentiometer- Potentiometers
5656
- Bedienelemente- Controls
5858
- Anzeigelement- Display element
6060
- Anschlussstecker- Connection plug
XX
- Längs- bzw. Drehachse- Longitudinal or rotary axis
AA
- Druckrichtung zum Öffnen der Anschlussklemme 46- Direction of pressure to open terminal 46

Claims (14)

  1. A pump assembly with an electrical drive motor which comprises a stator housing (2) and at least one terminal box (14) which is connected to this, wherein the terminal box (14) in its interior comprises at least one separating wall (30) which divides an interior of the terminal box (14) into at least one electronics region (32) with electronic components (40) and into a connection region (34), wherein the connection region (34) is adjacent to an outer wall (22) of the terminal box (14), in which outer wall at least one cable feed-through (36) is formed and electrical connections (46) for at least one connection lead as well as contacts (44) for the electrical connection to electrical or electronic components (18) which are arranged in the inside of the stator housing (2) are present in the connection region (34),
    wherein the connection region (34) faces the stator housing (2) and wherein the connection region (34) is designed in an open manner towards the stator housing (2) and is closed by the adjacent stator housing (2) or a cover (16) which closes the stator housing (2), in a manner such that when the terminal box (14) is removed from the stator housing , the connection region (34) in the terminal box is accessible from the side which otherwise faces the stator housing, so that a connection lead can be connected there.
  2. A pump assembly according to claim 1, characterised in that the terminal box (14) is applied onto an axial face side of the stator housing (2).
  3. A pump assembly according to one of the preceding claims, characterised in that the electrical connections (46) for the connection lead are designed as connection terminals (46).
  4. A pump assembly according to claim 3, characterised in that the connection terminals (46) extend through the separating wall (30).
  5. A pump assembly according to claim 1 or 2, charatcreised in that the electrical connections (46) for the connection lead are designed as plug-in contacts.
  6. A pump assembly according to claim 5, characterised in that the plug-in contacts extend through the separating wall (30).
  7. A pump assembly according to claim 3 or 4, characterised in that the connection terminals (46) comprise a lever (48) for opening the connection terminals (46), wherein the lever (48) is arranged such that for opening, it can be moved towards a cable feed-through (36) in a wall (22) of the connection space (34).
  8. A pump assembly according to one of the preceding claims, characterised in that the contacts for the electrical connection to the electrical or electronic components (18) in the inside of the stator housing (2) are designed as plug-in contacts (44) which are engaged with corresponding plug-in contacts (20) on the stator or stator housing (2).
  9. A pump assembly according to one of the preceding claims, characterised in that the separating wall (30) at least in a section (30b) runs obliquely to the outer sides (22, 24), in particular the face sides (24) of the terminal box (14).
  10. A pump assembly according to one of the preceding claims, characterised in that the terminal box (14) is designed in a pot-like manner with an open side (36) which is closed by the stator housing (2) or a cover (16) which closes the stator housing (2).
  11. A pump assembly according to one of the preceding claims, characterised in that the separating wall (30) is a separate component which is inserted into the terminal box (14) and which is connected to the walls of the terminal box (14) preferably via latching connections.
  12. A pump assembly according to one of the preceding claims, characterised in that the separating wall (30) carries at least one circuit board (38) which is arranged in the electronics region (32).
  13. A pump assembly according to one of the preceding claims, characterised in that it is designed as a circulation pump assembly, in particular as a heating or service water circulation pump assembly.
  14. A pump assembly according to one of the preceding claims, characterised in that the drive motor is a canned motor.
EP11002129.2A 2010-11-11 2011-03-15 Pump unit Active EP2453558B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201180064776.4A CN103299515B (en) 2010-11-11 2011-11-02 Pump assembly
US13/884,631 US9800098B2 (en) 2010-11-11 2011-11-02 Pump unit
PCT/EP2011/069260 WO2012062636A2 (en) 2010-11-11 2011-11-02 Pump unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010051916A DE102010051916A1 (en) 2010-11-11 2010-11-11 Pump unit e.g. hot water circulation pump used in domestic application, has electronic control element that is mounted in printed circuit board provided in stator housing, for controlling commutation of the electric motor
DE102010051918A DE102010051918A1 (en) 2010-11-11 2010-11-11 Housing cap, housing cap device and housing for a circulation pump

Publications (3)

Publication Number Publication Date
EP2453558A2 EP2453558A2 (en) 2012-05-16
EP2453558A3 EP2453558A3 (en) 2017-01-18
EP2453558B1 true EP2453558B1 (en) 2022-09-14

Family

ID=44146964

Family Applications (5)

Application Number Title Priority Date Filing Date
EP11002129.2A Active EP2453558B1 (en) 2010-11-11 2011-03-15 Pump unit
EP11002127.6A Active EP2453557B1 (en) 2010-11-11 2011-03-15 Wet-running electric motor and pump assembly
EP11002126.8A Active EP2453556B1 (en) 2010-11-11 2011-03-15 Electric motor
EP11002128.4A Active EP2453560B1 (en) 2010-11-11 2011-03-15 Pump unit
EP11002125.0A Active EP2453555B1 (en) 2010-11-11 2011-03-15 Pump unit

Family Applications After (4)

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EP11002127.6A Active EP2453557B1 (en) 2010-11-11 2011-03-15 Wet-running electric motor and pump assembly
EP11002126.8A Active EP2453556B1 (en) 2010-11-11 2011-03-15 Electric motor
EP11002128.4A Active EP2453560B1 (en) 2010-11-11 2011-03-15 Pump unit
EP11002125.0A Active EP2453555B1 (en) 2010-11-11 2011-03-15 Pump unit

Country Status (5)

Country Link
US (5) US9800098B2 (en)
EP (5) EP2453558B1 (en)
CN (5) CN103370852B (en)
PL (2) PL2453555T3 (en)
WO (5) WO2012062637A2 (en)

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US9570945B2 (en) 2017-02-14
CN103299513B (en) 2016-01-20
CN103282670A (en) 2013-09-04
EP2453557B1 (en) 2022-11-16
WO2012062637A2 (en) 2012-05-18
WO2012062638A3 (en) 2013-04-25
WO2012062636A3 (en) 2013-04-11
WO2012062638A2 (en) 2012-05-18
EP2453555A2 (en) 2012-05-16
EP2453558A2 (en) 2012-05-16
US9490668B2 (en) 2016-11-08
US20140035416A1 (en) 2014-02-06
WO2012062637A3 (en) 2013-04-25
EP2453558A3 (en) 2017-01-18
US20130315752A1 (en) 2013-11-28
EP2453555B1 (en) 2023-02-08
EP2453557A3 (en) 2017-05-03
EP2453560A2 (en) 2012-05-16
PL2453557T3 (en) 2023-04-11
CN103299518B (en) 2016-06-29
WO2012062650A3 (en) 2013-05-10
US9800098B2 (en) 2017-10-24
US20130300330A1 (en) 2013-11-14
EP2453556A2 (en) 2012-05-16
CN103282670B (en) 2016-02-24
US9362784B2 (en) 2016-06-07
CN103370852A (en) 2013-10-23
WO2012062639A2 (en) 2012-05-18
EP2453556A3 (en) 2017-05-03
EP2453560A3 (en) 2016-12-14
EP2453557A2 (en) 2012-05-16
CN103299515B (en) 2016-08-31
PL2453555T3 (en) 2023-06-05
EP2453556B1 (en) 2023-05-03
US20130294949A1 (en) 2013-11-07
US10236731B2 (en) 2019-03-19
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